Hub shell for electric bicycle

Abstract

The utility model discloses a hub shell for an electric bicycle, which comprises a shell body, a transmission is mounted in the shell body, and the shell body adopts a combined structure; the combined structure comprises an inner cavity structure used for installing the transmission and a sealing structure used for preventing the transmission from being damaged by the external environment. The inner cavity structure is composed of a cylinder and an end cover, hub discs are symmetrically installed at the positions, close to the two ends, of the outer wall of the cylinder, and a cavity is formed in the left side of the cylinder; the sealing structure comprises a plurality of positioning columns, a plurality of positioning grooves and a plurality of locking plugs, and the number of the positioning columns, the number of the positioning grooves and the number of the locking plugs are the same. By means of the mode, the hub shell for the electric bicycle is of a combined structure, a hub can be disassembled and assembled without the help of external tools, and the problem that a built-in hub is difficult to disassemble and assemble due to the structure is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric bicycle field especially is related to a hub shell for electric bicycle. BACKGROUND

[0002] Electric bicycle is a kind of bicycle equipped with electric motor, can provide additional power by battery, help rider to overcome obstacles more easily when riding, climb or long time ride.

[0003] In electric bicycle, hub is the core component of wheel, bears multiple key roles, directly influences the performance and function of vehicle, is the core of mechanical support, also can directly become power source, and its design directly influences riding efficiency, safety and maintenance cost.

[0004] In order to guarantee the cleanliness of derailleur, improve its service life, the existing electric bicycle hub usually embeds derailleur in the hub, uses stainless steel material, thereby guarantees its durable and lasting, but after long-term use, with the wear and tear of derailleur parts, improper adjustment or cable slack, it is easy to cause gear shifting not smooth, influence riding experience, if internal gear is damaged, usually needs to replace hub as a whole, and the cost is much higher than that of repairing single part of external derailleur. SUMMARY

[0005] The utility model mainly solves the technical problem to provide a kind of hub shell for electric bicycle, can be disassembled and assembled to hub without the aid of external tool.

[0006] To solve the above technical problems, one technical scheme of the utility model is provided: provide a kind of hub shell for electric bicycle, including shell body, the shell body is installed with derailleur, the shell body adopts combined structure;

[0007] The combined structure includes inner cavity structure for installing the derailleur and sealing structure for preventing external environment from damaging the derailleur;

[0008] The inner cavity structure is composed of cylinder and end cover, the cylinder outer wall is symmetrically installed with hub disc near both ends, the left side of the cylinder is provided with cavity, the end cover is installed at the opening of the cavity, and the left side center of the end cover and the right side center of the cylinder are both provided with circular hole for axle penetration;

[0009] The sealing structure includes a plurality of positioning columns, a plurality of positioning grooves and a plurality of locking plugs, the number of the positioning column, the positioning groove and the locking plug is same.

[0010] In a preferred embodiment of the utility model, two the round hole outer sides are equipped with recess, two the recesses install the bearing of different size, the bearing of the right side of the cylinder is matched with the sprocket on the wheel shaft, the bearing of the left side of the end cover is matched with the wheel shaft.

[0011] In a preferred embodiment of the utility model, a plurality of positioning columns are arranged on the right side of the end cover with the end cover as the center, the right side of the positioning column is provided with a locking block, and the left side of the positioning column is provided with a mounting port on the end cover.

[0012] In a preferred embodiment of the utility model, a plurality of positioning grooves are arranged on the left side of the cylinder with the cylinder as the center, the right side of the positioning groove is further provided with a locking groove matched with the locking block, and a mounting groove is formed on the cylinder surface on the left side of the positioning groove bottom and the positioning groove mouth.

[0013] In a preferred embodiment of the utility model, after the locking block is inserted into the locking groove, the mounting port and the positioning groove form a fixing groove.

[0014] In a preferred embodiment of the utility model, the bottom of the locking plug is provided with two mounting columns, and after the locking plug is mounted in the fixing groove, the two mounting columns are inserted into the mounting groove.

[0015] The utility model discloses a hub shell for electric bicycle, which adopts a combined structure and can be disassembled and assembled without external tools, thereby solving the disassembly and assembly difficulty of the built-in hub caused by the structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a kind of for electric bicycle's hub shell front view sectional view.

[0017] Fig. 2 It is a kind of for electric bicycle's hub shell cylinder left view.

[0018] Fig. 3 It is a kind of for electric bicycle's hub shell end cover right view.

[0019] Fig. 4 It is a kind of for electric bicycle's hub shell positioning column and positioning groove installation schematic drawing.

[0020] The marks of components in the drawings are as follows: 1, cylinder;2, end cover;3, round hole;4, recess;5, wheel shaft;6, hub disc;7, sprocket;8, positioning column;9, locking block;10, mounting port;11, positioning groove;12, locking groove;13, mounting groove;14, locking plug;15, mounting column. DETAILED DESCRIPTION

[0021] The advantages and features of the present application will be more apparent from the following detailed description of the preferred embodiments of the present application, and thus the scope of the present application will be more clearly defined.

[0022] According to Figs. 1 to 4 The shell body of the hub shell for the electric bicycle comprises a shell body, a speed changer is installed in the shell body, the shell body adopts a combined structure, the hub can be disassembled without external tools, and the problem of disassembly difficulty of the built-in hub due to the structure is solved.

[0023] The combined structure comprises a cavity structure for installing the speed changer and a sealing structure for preventing damage to the speed changer by the external environment, the cavity structure is composed of a cylinder 1 and an end cover 2, hub discs 6 are symmetrically installed on the outer wall of the cylinder 1 near both ends, and a plurality of spoke holes are arrayed on the hub discs 6 with the axis of the cylinder 1 as the center.

[0024] A cavity is formed on the left side of the cylinder 1, the end cover 2 is installed at the opening of the cavity, and a circular hole 3 for the wheel shaft 5 to penetrate is formed on the left side center of the end cover 2 and the right side center of the cylinder 1.

[0025] The sealing structure comprises a plurality of positioning columns 8, a plurality of positioning grooves 11 and a plurality of locking plugs 14, the number of the positioning columns 8, the positioning grooves 11 and the locking plugs 14 is the same, and in the embodiment, the number of the positioning columns 8 is four.

[0026] Grooves 4 are arranged on the outer edges of the two circular holes 3, bearings with different sizes are installed in the two grooves 4, the bearing on the right side of the cylinder 1 cooperates with the sprocket 7 on the wheel shaft 5, the bearing on the left side of the end cover 2 cooperates with the wheel shaft 5, and the bearing makes the wheel shaft 5 rotate more stably.

[0027] A plurality of positioning columns 8 are arrayed on the right side of the end cover 2 with the end cover 2 as the center, locking blocks 9 are arranged on the right side of the positioning columns 8, the locking blocks 9 cooperate with the locking grooves 12, the end cover 2 and the cylinder 1 are relatively moved, so that the end cover 2 and the cylinder 1 are connected and locked.

[0028] An installation port 10 is formed on the end cover 2 on the left side of the positioning column 8, and the installation port 10 is used for the installation of the locking plug 14.

[0029] A plurality of positioning grooves 11 are arranged in the left side of the cylinder 1 with the cylinder 1 as the center, a locking groove 12 matched with the locking block 9 is further arranged in the right side of the positioning groove 11, and an installation groove 13 is arranged on the surface of the cylinder 1 at the left side of the opening of the positioning groove 11 and the bottom of the positioning groove 11, which is used for positioning and fixing the locking plug 14.

[0030] After the locking block 9 is inserted into the locking groove 12, the installation opening 10 and the positioning groove 11 form a fixing groove, which is used for installing the locking plug 14.

[0031] The bottom of the locking plug 14 is provided with two installation columns 15, after the locking plug 14 is installed in the fixing groove, the two installation columns 15 are correspondingly inserted into the installation grooves 13, and the locking plug 14 is finally fixed, the locking plug 14 is made of elastic material, so that the installation and disassembly are more convenient, and the locking plug 14 can completely fill the fixing groove under the condition of the elasticity of the locking plug 14, so as to play a fixing role.

[0032] During installation, the positioning column 8 is correspondingly inserted into the positioning groove 11, the end cover 2 is rotated clockwise, the locking block 9 is rotated into the locking groove 12, and finally the locking plug 14 is installed into the fixing groove, so that the installation of the end cover 2 and the cylinder 1 is completed.

[0033] During disassembly, the locking plug 14 is first pried out of the fixing groove, the end cover 2 is counterclockwise rotated, the positioning column 8 is rotated out of the positioning groove 11, so that the disassembly of the end cover 2 and the cylinder 1 is completed.

[0034] Compared with the prior art, the utility model discloses a hub shell for electric bicycle, which adopts a combined structure and can disassemble and assemble the hub without external tools, thereby solving the disassembly and assembly difficulty of the built-in hub caused by the structure.

[0035] In the description of the utility model, it should be explained that components are all general standard components or components known by those skilled in the art, and the structure and principle thereof can be known by the technical personnel through technical manual or through conventional test method, the terms "up", "down", "left", "right", "in", "out" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0036] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A hub shell for an electric bicycle, comprising a shell body in which a derailleur is mounted, characterized in that, The shell body adopts a combined structure; The combined structure comprises an inner cavity structure for mounting the transmission and a sealing structure for preventing damage to the transmission from the external environment; The inner cavity structure is composed of a cylinder and an end cover, the outer wall of the cylinder is symmetrically provided with a hub disc near both ends, a cavity is formed in the left side of the cylinder, the end cover is mounted at the opening of the cavity, and a circular hole for the axle to pass through is formed in the center of the left side of the end cover and the right side of the cylinder; The sealing structure comprises a plurality of positioning columns, a plurality of positioning grooves and a plurality of locking plugs, and the number of the positioning columns, the positioning grooves and the locking plugs is the same.

2. The hub shell for an electric bicycle of claim 1, wherein, Two recesses are arranged along the outer edges of the two circular holes, bearings with different sizes are mounted in the two recesses, the bearing on the right side of the cylinder is matched with a sprocket on the axle, and the bearing on the left side of the end cover is matched with the axle.

3. The hub shell for an electrically driven bicycle of claim 2, wherein, A plurality of positioning columns are arranged on the right side of the end cover in an array with the end cover as the center, a locking block is arranged on the right side of the positioning column, and a mounting opening is formed in the end cover on the left side of the positioning column.

4. The hub shell for an electrically driven bicycle of claim 3, wherein, A plurality of positioning grooves are arranged on the left side of the cylinder in an array with the cylinder as the center, a locking groove matched with the locking block is further formed in the right side of the positioning groove, and a mounting groove is formed in the cylinder surface on the bottom of the positioning groove and the left side of the positioning groove opening.

5. The hub shell for an electrically driven bicycle of claim 4, wherein, After the locking block is inserted into the locking groove, the mounting opening and the positioning groove form a fixing groove.

6. The hub shell for an electrically driven bicycle of claim 5, wherein, The locking plug is provided with two mounting columns at the bottom, and after the locking plug is mounted in the fixing groove, the two mounting columns are inserted into the mounting groove correspondingly.

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